Air-draft for locomotives.



PATENTED JUNE 13, 1905.

R. F. COX.

AIR DRAFT FOR LOCOMOTIVES.

APPLICATION FILED AUG. 26, 1904.

CL WW.

UNITED STATES Patented June 13, 1905.

PATENT OFFICE.

RUPERT F. COX, OF MANSFIELD, OHIO.

AIR-DRAFT FOR To all whom, it may concern.-

Be it known that I, RUPERT F. Cox, a citizen of the United States,residing at Mansfield, in the county of Richland and State of Ohio, haveinvented certain new and useful Improvements in Air-Drafts forLocomotives, of which the following is a specification, reference beinghad therein to the accompanying drawings.

My invention relates to improvements in air-drafts forlocomotive-boilers; and the objects of my invention are to provide ameans for supplying the furnace with air of sufficicnt quantity to makea perfect draft and to obviate the necessity of using a heavy exhaust,which is now common in locomotives. These objects I accomplish by themechanism illustrated in the accompanying drawings, in which Figure 1 isa side elevation of a locomotiveengine, showing the position in which Iplace the air-draft tubes. Fig. 2 is an enlarged front View of boiler,showing the fire-box in section to show the position in which I placethe air-draft tubes under the grate-bars. Fig. 3 is a longitudinalsectional view of fire-box, showing the ends of the air-draft tubes.Fig. 4: is a top view of boiler and air-draft tubes to show more fullythe arrangement of the same.

Similar characters of reference indicate the several parts throughoutthe views.

In the accompanying drawings the letter A designates a locomotive-boilerwhich is of general construction and now in general use. Secured uponeach side of the boiler and under the foot-rail B are the air-drafttubes C C. The front ends D D of the tubes C C are bell-mouthed andcurved to conform to the diameter of the boiler, the portions C C beinground and extending longitudinally with the boiler. The said tubesextend downward on an incline E to a line with the under side of thegrate-bars F, thence at right angles across the fire-box ash-pit. Theupper walls of the said tubes are provided with perforations G to allowthe air to pass through the LOCOMOTIVES.

Patent No. 792,318, dated June 13, 1905.

1904. Serial No. 222,290.

openings H between the grate-bars F. A tube I may be connected with thetube E to enter the fire-box above the fire. Said tube is perforated toaid in the combustion of fuel in the furnace.

The construction and arrangement of the parts are fully illustrated anddescribed.

In Fig. 3 I show the front of the ash-pit made to open. The door J ishinged upon its upper edge and may be operated from the cab by link 1,lever 2, and rod 3, as will be understood. Dampers 0 may be placedwithin the air-tubes C and operated to reduce the amount of air-currentwhen necessary.

It will be readily seen by those skilled in the art that when the engineis in motion the air will pass into the bell-mouth tubes D, thencethrough the pipes C and E, and through the perforations G, which willgive all neces sary draft to the fire, obviating the necessity of havingheavy exhaust from the cylinders. It will also be seen that the velocityas it increases gives more air-pressure.

I do not wish to limit myself to the number of tubes passing under orover the gratebars, as any number can be used.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In combination with a locomotive-boiler a plurality of air-tubes havingfunnel-shaped mouths at their front ends and extended to the fire-boxwhere they enter above and below the grate-bars, said tubes beingperforated within the li re-box to discharge air above and below thefire, dampers located in said air-tubes, and the front of the ash-pithinged and the draft therein controlled from the cab of the locomotiveby link 1, lever 2, and rod 3, all combined substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

RUPERT F. COX.

Witnesses:

T. Y. MoCRAY,

F. M. BUSHNELL.

